Running this script on Windows?

[Winfried]

Hello,

I need to run a Python script that contains the following lines :

#! /usr/bin/env nix-shell
#! nix-shell -i python3 -p "python3.withPackages(ps: with ps; [pandas scipy requests (python3Packages.callPackage ./openrouteservice-py.nix {})])"

import sys
import os
import pandas as pd
import requests
from time import sleep
from scipy.spatial import Delaunay
from threading import Lock
import pickle
from pathlib import Path
import openrouteservice
import json

I have the following questions:
1. What do the first lines do?
2. Can I get rid of them to run the script on Windows?
3. How do I check which packages I need to run it? Trial and error until it runs?

Thank you.

[snippsat]

1. What do the first lines do?
2. Can I get rid of them to run the script on Windows?

These lines is called shebang,and used on Linux.
You can delete them,i never use shebang on Linux either.

3. How do I check which packages I need to run it? Trial and error until it runs?

Usually there is a usage/install instruction bye the maker that use these libraries in there code.

# 3-party libraries
import pandas as pd
import requests
from scipy.spatial import Delaunay
import openrouteservice

# Standard library(comes with python)
from pathlib import Path
from time import sleep
from threading import Lock
import pickle
import json
import sys
import os

Quick demo of venv that now comes with Python.
It's virtual environments so it's like new Python instantiation that's isolated stuff,if you don't know what it is.

# Make
E:\div_code
λ python -m venv test_env

# Cd in 
E:\div_code
λ cd test_env\

# Activate
E:\div_code\test_env
λ E:\div_code\test_env\Scripts\activate

# Install
(test_env) E:\div_code\test_env
λ pip install requests pandas scipy openrouteservice
Collecting requests .....
Successfully installed certifi-2020.4.5.1 chardet-3.0.4 idna-2.9 numpy-1.18.4 openrouteservice-2.3.0
pandas-1.0.3 python-dateutil-2.8.1 pytz-2020.1 requests-2.23.0 scipy-1.4.1 six-1.14.0 urllib3-1.25.9  

# Test that it work
(test_env) E:\div_code\test_env
λ python
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pandas as pd
>>>
>>> import requests
>>>
>>> from scipy.spatial import Delaunay
>>>
>>> import openrouteservice
>>>
>>> exit()

As mention Standard library modules comes with Python and need no install.
So now have all that's needed,only missing code

[Winfried]

Thanks much!